Results 61 to 70 of about 3,845,868 (264)

Vibration analysis of footbridges: an overview of the current practice

MATEC Web of Conferences, 2018
The design of a footbridge is typically controlled by serviceability criteria. The dynamic forces induced by pedestrians may result in high-amplitude vibrations that the users may feel as uncomfortable, or unsafe. As a consequence of the several cases of
De Luca Antonio, Bauer Michael, Pinto Marguerite, Malsch Elisabeth   +3 more
doaj   +1 more source

Testing Walking-Induced Vibration of Floors Using Smartphones Recordings

Robotics, 2020
Smartphone technology is rapidly evolving, adding sensors of growing accuracy and precision. Structural engineers are among customers who indirectly benefit from such technological advances.
Luca Martinelli, Vitomir Racic, Bruno Alberto Dal Lago, Francesco Foti   +3 more
doaj   +1 more source

Damping Of Pedestrian‐Induced Bridge Vibrations By Tuned Liquid Column Dampers [PDF]

PAMM, 2004
AbstractThe excessive lateral vibrations of Londons Millenium Bridge and the Toda Park Bridge in Japan due to a large number of crossing pedestrians have raised an unexpected problem in footbridge constructions. Secondary tuned structures, like the conventional tuned mass damper (TMD) or the tuned liquid damper (TLD) were installed to the bridge in ...
Michael Reiterer, Markus Hochrainer
openaire   +1 more source

Lock-in of the vortex-induced vibrations of a long tensioned beam in shear flow [PDF]

, 2011
The occurrence of lock-in, defined as the local synchronization between the vortex shedding frequency and the cross-flow structural vibration frequency, is investigated in the case of a tensioned beam of length to diameter ratio 200, free to move in both
Rémi Bourguet, George E. Karniadakis, Triantafyllou, Michael S., Karniadakis, George E., Bourguet, Rémi, Michael S. Triantafyllou   +5 more
core   +1 more source

Toward Mechanical Intelligence in Robotics

Advanced Robotics Research, EarlyView.
Robots can use their physical bodies to perform functions usually assigned to electronic sensors and controllers. This perspective defines mechanical intelligence through three core operations: filtering inputs, routing mechanical signals, and switching between states.
Xinyi Yang, Xinyi Ding, Tianyu Wang, Daniel I. Goldman, Shucong Li, Bolei Deng   +5 more
wiley   +1 more source

Standards guidelines for human comfort tested on timber footbridges

Semina: Ciências Exatas e Tecnológicas, 2011
Activities such as walking, running and jumping can produce undesirable dynamic excitations, which are a phenomenon that occurs due to pedestrian-induced dynamic forces whenever a footbridge features a natural frequency within stepping frequency ranges ...
Pedro Gutemberg de Alcântara Segundinho, Antonio Alves Dias, Marcelo Rodrigo Carreira   +2 more
doaj  

Footbridge Response On Single Pedestrian Induced Vibration Analysis

, 2009
Many footbridges have natural frequencies that coincide with the dominant frequencies of the pedestrian-induced load and therefore they have a potential to suffer excessive vibrations under dynamic loads induced by pedestrians. Some of the design standards introduce load models for pedestrian loads applicable for simple structures.
J. Kala, V. Salajka, P. Hradil
openaire   +2 more sources

Longitudinal Morphomolecular Monitoring of Head and Neck Carcinogenesis

Advanced Science, EarlyView.
A miniaturized endoscopic probe that integrates Raman spectroscopy and optical coherence tomography, enabling simultaneous molecular and structural imaging of living tissue, was developed. Applied longitudinally in a mouse model of head and neck cancer, the system tracks disease progression from precancerous lesions to invasive cancer.
Jianrong Qiu, Priyanka G. Bhosale, Vishal Kumar, Jeyrroy Gabriel, Shiyue Liu, Ciro Chiappini, Richard J. Cook, Mads S. Bergholt   +7 more
wiley   +1 more source

Phase‐Resolved Dual Control of Phenol Photodissociation at the Air–Water Interface From Structure‐Resolved Statistics

Advanced Science, EarlyView.
Faster phenol photolysis at the air–water interface arises from two cooperative factors: a more favorable initial microenvironment for solvent‐side electron stabilization, which lowers CI access, and a more labile hydrogen‐bond network, which more readily reorganizes to stabilize the dark‐state intermediate.
Qiang Yin, Jialing Shi, Jinping Zhao, Chengjun Li, Yongbo Xie, Benkun Tan, Da Wang, Ziyun Wang, Yu Mao   +8 more
wiley   +1 more source

Study of pedestrian-induced vibrations on timber footbridges

Maderas: Ciencia y Tecnología, 2014
In Brazil, studies about pedestrian-induced vibrations on footbridges have been carried out since the early 1990s, for concrete and steel footbridges. However, there is no record of such studies and the Brazilian Standard NBR 7190 (1997) for the design ...
P. G. A. Segundinho
doaj